BS 4504 FLANGE oghere, FLANGE kpuru ìsì ebiliri ihu PN6, PN10, PN16, PN25, PN40 British Standard BS 4504 : Nkebi 3.1: 1989 - Flanges okirikiri maka ọkpọkọ, Valves na Flanges (PN. Ekepụtara), nkọwapụta.Nke a na-ekpuchi flanges na nominal mgbali nso PN 2.5 ka PN 40 na n ...
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